PS4.B: Electromagnetic Radiation


In this video Paul Andersen describes some of the properties of electromagnetic radiation.  The electromagnetic spectrum varies by wavelength from radio waves to gamma rays.  We only see a portion of the spectrum known as visible light.  A number of phenomenon (including refraction, emission spectrums, and gamma radiation) are discussed.  A teaching progression K-12 is also included.

PS4.A: Wave Properties


In this video Paul Andersen describes some of the properties of waves.  He starts be identifying particles and waves as the only phenomenon that can transfer energy from place to place.  He identifies the defining characteristics of waves; wavelength, frequency and amplitude.  He defines sound as the movement of compressional waves through air and resonance as waves interfering both constructively and destructively.  A teaching progression K-12 is also included.

CCC6: Structure and Function


Paul Andersen explains how the structure of objects are related to their function and vice versa.  He begins with a quick quiz on bicycle construction and ends with a progression of teaching for students grades K-12.  He also explains how the scale of an object will determine the function studied.

SEP2: Developing and Using Models

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Paul Andersen explains the importance of modeling in science and engineering.  Models are used by scientists to explain phenomenon.  Unlike mental models, conceptual models can be shared by all scientists to improve our understanding of the Universe.  Engineers use models study systems and test designs.